Fix getting Nix kconfig (contrib)

[a13xp0p0v]

Hello @Mic92, could you help with this Nix problem?

I tested the installation of kconfig-hardened-check in a Docker container with Ubuntu 20.04.4 LTS.

It failed with the following error:

a13x@dc92d9d74557:~/src/1/kconfig-hardened-check/contrib$ ./get-nix-kconfig.py 
these 50 paths will be fetched (94.58 MiB download, 374.80 MiB unpacked):
  /nix/store/058drky7qcyd04rzqcmxh86xmifw96dx-glibc-2.34-115-bin
  /nix/store/1442kn5q9ah0bhhqm99f8nr76diczqgm-gnused-4.8
  /nix/store/19xbyxc31snlk60cil7cx6l4xw126ids-gcc-11.2.0
  /nix/store/4r26nvzfa1qfjaqgr2bpw2fz8c6qnk3s-gnutar-1.34
  /nix/store/58pwclg9yr437h0pfgrnbd0jis8fqasd-gcc-wrapper-11.2.0
  /nix/store/5h6q8cmqjd8iqpd99566hrg2a56pwdkc-acl-2.3.1
  /nix/store/6rbwy3mf0w8z119bwqs7dcrc2vyql9sf-expand-response-params
  /nix/store/7b2vmi7cq7lzw8g6kaihzg2kyilj4slm-bash-interactive-5.1-p16-dev
  /nix/store/87xq1difvspida4391y23vylkjdcgllf-linux-headers-5.16
  /nix/store/9l06npv9sp8avdraahzi4kqhcp607d8p-tzdata-2022a
  /nix/store/9pxskbhf92x9cxvg87nbzw2q1kmkrym6-bash-interactive-5.1-p16-info
  /nix/store/9wq21cbqsxpdx4dk0q6gab00fcir04d1-gzip-1.12
  /nix/store/a0k6rfn47h9f69p15pg415x6pfpxhsl5-gdbm-1.23
  /nix/store/a5xpjds3mlln26469h72v1jmd00jq6lv-xz-5.2.5
  /nix/store/ayrsyv7npr0lcbann4k9lxr19x813f0z-glibc-2.34-115
  /nix/store/b36ilvc5hhfpcp7kv1kvrkgcxxpmxfsd-zlib-1.2.12
  /nix/store/bavmqg7c4366hbiccpsdawbilh68dajy-xz-5.2.5-bin
  /nix/store/bndvc0y3v4djij152wiqbyn13zs2xivy-pcre-8.45
  /nix/store/bqkx3pi50phcglv0l551jhp96bq8njl0-gnugrep-3.7
  /nix/store/c7062r0rh84w3v77pqwdcggrsdlvy1df-findutils-4.9.0
  /nix/store/clkdigybx5w29rjxnwnsk76q49gb12k7-ncurses-6.3
  /nix/store/d60gkg5dkw4y5kc055n4m0xyvcjz65im-bash-interactive-5.1-p16
  /nix/store/dgic5ks4yixhh0havidjwd02rskmqlgp-binutils-wrapper-2.38
  /nix/store/dxj6b99zh4fh5z65rqirmcfvffxx5ig0-readline-8.1p2
  /nix/store/f2fnhhjanmxganm3xa5inwgvi6wj2ran-bash-interactive-5.1-p16-doc
  /nix/store/fcd0m68c331j7nkdxvnnpb8ggwsaiqac-bash-5.1-p16
  /nix/store/gm6q7jmajjmnwd29wgbq2jm3x37vsw3h-libffi-3.4.2
  /nix/store/hgl0ydlkgs6y6hx9h7k209shw3v7z77j-coreutils-9.0
  /nix/store/hym1n0ygqp9wcm7pxn4sfrql3fg7xa09-python3-3.9.12
  /nix/store/ik4qlj53grwmg7avzrfrn34bjf6a30ch-libunistring-1.0
  /nix/store/jm3nxvmxcm5nvalbv28acvygismcykvj-gnumake-4.3
  /nix/store/k3wp5kdxwa4ysb6nh5y9yll5n30cja5m-patch-2.7.6
  /nix/store/m2vh2ny7bqpwij1gpmvl5gxj7y4dgr4f-binutils-2.38
  /nix/store/n239ln3v669s5fkir2fd8niqawyg6qrv-attr-2.5.1
  /nix/store/pmyiksh5sgqzakbr84qsfxqy8fgirmic-stdenv-linux
  /nix/store/psijdi9190zgbp053y6dj3ax4y2l70gk-gcc-11.2.0-lib
  /nix/store/pvn23vycg674bj6nypjcfyhqbr85rqxa-glibc-2.34-115-dev
  /nix/store/qd3g8rk5hx5zkb70idjh6fa12sh6bipg-mailcap-2.1.53
  /nix/store/qvs678k05yrv566dmqdnxfbzi4s6ir1n-sqlite-3.38.2
  /nix/store/rf3j3p8cvn0dr5wdl65ns9f8wnlca8h6-readline-6.3p08
  /nix/store/sj2plsn7wz94dkwvg1wlb11pjch6r70v-diffutils-3.8
  /nix/store/v8vpzh3slc5hm4d9id5bim4dsb4d2ndh-openssl-1.1.1n
  /nix/store/v990x4cib4dssspn4778rlz46jmm3a9k-expat-2.4.7
  /nix/store/vz05jxs509mgp5i5jbrgvgvg4a2p3a3m-ed-1.18
  /nix/store/w3zngkrag7vnm7v1q8vnqb71q6a1w8gn-libidn2-2.3.2
  /nix/store/wcj03nlvxsjrc1cmpl2nhpn80l5wvf8j-gawk-5.1.1
  /nix/store/x6jr3j9hxs8ld8cy69gy9aykrm3iz8rv-patchelf-0.14.5
  /nix/store/yjndwl7872iqhw7m97gv7kwgwd5d66s5-bzip2-1.0.6.0.2-bin
  /nix/store/zf03nlnk9h724gz7qzzbrzyqif8gbwhq-bzip2-1.0.6.0.2
  /nix/store/zghsxxqb2gyz460q4r7jfdc2lpg3rgjw-bash-interactive-5.1-p16-man
copying path '/nix/store/f2fnhhjanmxganm3xa5inwgvi6wj2ran-bash-interactive-5.1-p16-doc' from 'https://cache.nixos.org'...
copying path '/nix/store/9pxskbhf92x9cxvg87nbzw2q1kmkrym6-bash-interactive-5.1-p16-info' from 'https://cache.nixos.org'...
copying path '/nix/store/zghsxxqb2gyz460q4r7jfdc2lpg3rgjw-bash-interactive-5.1-p16-man' from 'https://cache.nixos.org'...
copying path '/nix/store/ik4qlj53grwmg7avzrfrn34bjf6a30ch-libunistring-1.0' from 'https://cache.nixos.org'...
copying path '/nix/store/87xq1difvspida4391y23vylkjdcgllf-linux-headers-5.16' from 'https://cache.nixos.org'...
copying path '/nix/store/w3zngkrag7vnm7v1q8vnqb71q6a1w8gn-libidn2-2.3.2' from 'https://cache.nixos.org'...
copying path '/nix/store/qd3g8rk5hx5zkb70idjh6fa12sh6bipg-mailcap-2.1.53' from 'https://cache.nixos.org'...
copying path '/nix/store/ayrsyv7npr0lcbann4k9lxr19x813f0z-glibc-2.34-115' from 'https://cache.nixos.org'...
copying path '/nix/store/9l06npv9sp8avdraahzi4kqhcp607d8p-tzdata-2022a' from 'https://cache.nixos.org'...
copying path '/nix/store/n239ln3v669s5fkir2fd8niqawyg6qrv-attr-2.5.1' from 'https://cache.nixos.org'...
copying path '/nix/store/fcd0m68c331j7nkdxvnnpb8ggwsaiqac-bash-5.1-p16' from 'https://cache.nixos.org'...
copying path '/nix/store/5h6q8cmqjd8iqpd99566hrg2a56pwdkc-acl-2.3.1' from 'https://cache.nixos.org'...
copying path '/nix/store/zf03nlnk9h724gz7qzzbrzyqif8gbwhq-bzip2-1.0.6.0.2' from 'https://cache.nixos.org'...
copying path '/nix/store/hgl0ydlkgs6y6hx9h7k209shw3v7z77j-coreutils-9.0' from 'https://cache.nixos.org'...
copying path '/nix/store/yjndwl7872iqhw7m97gv7kwgwd5d66s5-bzip2-1.0.6.0.2-bin' from 'https://cache.nixos.org'...
copying path '/nix/store/sj2plsn7wz94dkwvg1wlb11pjch6r70v-diffutils-3.8' from 'https://cache.nixos.org'...
copying path '/nix/store/vz05jxs509mgp5i5jbrgvgvg4a2p3a3m-ed-1.18' from 'https://cache.nixos.org'...
copying path '/nix/store/6rbwy3mf0w8z119bwqs7dcrc2vyql9sf-expand-response-params' from 'https://cache.nixos.org'...
copying path '/nix/store/v990x4cib4dssspn4778rlz46jmm3a9k-expat-2.4.7' from 'https://cache.nixos.org'...
copying path '/nix/store/c7062r0rh84w3v77pqwdcggrsdlvy1df-findutils-4.9.0' from 'https://cache.nixos.org'...
copying path '/nix/store/wcj03nlvxsjrc1cmpl2nhpn80l5wvf8j-gawk-5.1.1' from 'https://cache.nixos.org'...
copying path '/nix/store/psijdi9190zgbp053y6dj3ax4y2l70gk-gcc-11.2.0-lib' from 'https://cache.nixos.org'...
copying path '/nix/store/a0k6rfn47h9f69p15pg415x6pfpxhsl5-gdbm-1.23' from 'https://cache.nixos.org'...
copying path '/nix/store/058drky7qcyd04rzqcmxh86xmifw96dx-glibc-2.34-115-bin' from 'https://cache.nixos.org'...
copying path '/nix/store/jm3nxvmxcm5nvalbv28acvygismcykvj-gnumake-4.3' from 'https://cache.nixos.org'...
copying path '/nix/store/pvn23vycg674bj6nypjcfyhqbr85rqxa-glibc-2.34-115-dev' from 'https://cache.nixos.org'...
copying path '/nix/store/1442kn5q9ah0bhhqm99f8nr76diczqgm-gnused-4.8' from 'https://cache.nixos.org'...
copying path '/nix/store/4r26nvzfa1qfjaqgr2bpw2fz8c6qnk3s-gnutar-1.34' from 'https://cache.nixos.org'...
copying path '/nix/store/9wq21cbqsxpdx4dk0q6gab00fcir04d1-gzip-1.12' from 'https://cache.nixos.org'...
copying path '/nix/store/gm6q7jmajjmnwd29wgbq2jm3x37vsw3h-libffi-3.4.2' from 'https://cache.nixos.org'...
copying path '/nix/store/clkdigybx5w29rjxnwnsk76q49gb12k7-ncurses-6.3' from 'https://cache.nixos.org'...
copying path '/nix/store/v8vpzh3slc5hm4d9id5bim4dsb4d2ndh-openssl-1.1.1n' from 'https://cache.nixos.org'...
copying path '/nix/store/k3wp5kdxwa4ysb6nh5y9yll5n30cja5m-patch-2.7.6' from 'https://cache.nixos.org'...
copying path '/nix/store/x6jr3j9hxs8ld8cy69gy9aykrm3iz8rv-patchelf-0.14.5' from 'https://cache.nixos.org'...
copying path '/nix/store/bndvc0y3v4djij152wiqbyn13zs2xivy-pcre-8.45' from 'https://cache.nixos.org'...
copying path '/nix/store/rf3j3p8cvn0dr5wdl65ns9f8wnlca8h6-readline-6.3p08' from 'https://cache.nixos.org'...
copying path '/nix/store/bqkx3pi50phcglv0l551jhp96bq8njl0-gnugrep-3.7' from 'https://cache.nixos.org'...
copying path '/nix/store/dxj6b99zh4fh5z65rqirmcfvffxx5ig0-readline-8.1p2' from 'https://cache.nixos.org'...
copying path '/nix/store/a5xpjds3mlln26469h72v1jmd00jq6lv-xz-5.2.5' from 'https://cache.nixos.org'...
copying path '/nix/store/d60gkg5dkw4y5kc055n4m0xyvcjz65im-bash-interactive-5.1-p16' from 'https://cache.nixos.org'...
copying path '/nix/store/bavmqg7c4366hbiccpsdawbilh68dajy-xz-5.2.5-bin' from 'https://cache.nixos.org'...
copying path '/nix/store/7b2vmi7cq7lzw8g6kaihzg2kyilj4slm-bash-interactive-5.1-p16-dev' from 'https://cache.nixos.org'...
copying path '/nix/store/b36ilvc5hhfpcp7kv1kvrkgcxxpmxfsd-zlib-1.2.12' from 'https://cache.nixos.org'...
copying path '/nix/store/m2vh2ny7bqpwij1gpmvl5gxj7y4dgr4f-binutils-2.38' from 'https://cache.nixos.org'...
copying path '/nix/store/19xbyxc31snlk60cil7cx6l4xw126ids-gcc-11.2.0' from 'https://cache.nixos.org'...
copying path '/nix/store/dgic5ks4yixhh0havidjwd02rskmqlgp-binutils-wrapper-2.38' from 'https://cache.nixos.org'...
copying path '/nix/store/qvs678k05yrv566dmqdnxfbzi4s6ir1n-sqlite-3.38.2' from 'https://cache.nixos.org'...
copying path '/nix/store/58pwclg9yr437h0pfgrnbd0jis8fqasd-gcc-wrapper-11.2.0' from 'https://cache.nixos.org'...
copying path '/nix/store/hym1n0ygqp9wcm7pxn4sfrql3fg7xa09-python3-3.9.12' from 'https://cache.nixos.org'...

copying path '/nix/store/pmyiksh5sgqzakbr84qsfxqy8fgirmic-stdenv-linux' from 'https://cache.nixos.org'...
Traceback (most recent call last):
  File "/home/a13x/src/1/kconfig-hardened-check/contrib/./get-nix-kconfig.py", line 30, in <module>
    main()
  File "/home/a13x/src/1/kconfig-hardened-check/contrib/./get-nix-kconfig.py", line 16, in main
    data = json.loads(proc.stdout)
  File "/nix/store/hym1n0ygqp9wcm7pxn4sfrql3fg7xa09-python3-3.9.12/lib/python3.9/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
  File "/nix/store/hym1n0ygqp9wcm7pxn4sfrql3fg7xa09-python3-3.9.12/lib/python3.9/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/nix/store/hym1n0ygqp9wcm7pxn4sfrql3fg7xa09-python3-3.9.12/lib/python3.9/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Hoping for your help with Nix, @Mic92!